Valve device for steam-heating systems.



No. 700,569. Patented May 20, I902.

J. A. SEBBELL. VALVE DEWLGE'FOR STEAM HEATING SYSTEMS. Application fi1ed- Ma-r. 19, 1900.)

(No Model.)

UNITED STATES f PATENT OFFICE.

JOHN A. SERRELL, OF BAYONNE, NE YV JERSEY, ASSIGNOR TO \VARREN WEBSTER AND COMPANY, A CORPORATION OF NEIV JERSEY.

VALVE DEVICE FOR STEAM-HEATING SYSTEMS.

SPECIFICATION forming part of Letters Eatent .No. 700,569, dated May 20, 1902.

Application filed March 19,1900. Serial No. 9,476. (No model.)

- To all whom it may concern:

Be it known that I, JOHN A. SERRELL, of Bayonne, county of Hudson, and State of New Jersey, have invented an Improvement in Valve Devices for Steam- Heating Systems, of which the following is a specification.

My invention relates'to valve devices for steam-heating systems; and it consists of certain improvements, which are fully set forth in the following specification and are shown in the accompanying drawings.

In a suction system of steam -heating, or

one in which a partial vacuum or lower pressure is maintained in the returns or on the outlet side of the valve for the purpose of withdrawing the air and water of condensation, it is customary to employ an automatically controlled valve -piece to control the thoroughfare and the discharge of the water, of condensation, while preventing the escape, of uncondensed steam. It frequently results. that owing to a sudden or excessive con} densation in a radiator or drying cylinder there is a lower pressure created therein than exists in the return and as theautomatic valves under these conditions are open it re-- sults that the water of condensation is drawn back through the open'va'lves into the radiator or heater. It is the object of my invention to overcome this difiiculty by providing the valve device with an auxiliary check valve in addition to the automaticallycontrolled valve-piece, which also controls. the thoroughfare, but is so arranged as to I be normally held open by the suction or lower pressure in the return and to close automatically when the pressure on theinlet side of the valvebody or in the radiator is reduced below the pressure on the outlet side or in the return. In carrying out this part of my invention I-so arrange-the check-valve that it will be opened by the suction or lower pressure in the discharge "side, but will remain closed automaticallywhen the pressuresare equal or the suctionis relieved or itsdire'ction is reversed.

In the drawings, Figure l is a vertical sectional view of a valve device embodying my invention. Fig. 2 is a perspective View, in-

verted, of the check-valve. Fig. 3'is'a plan view of the valve seat-piece shown in Fig. 1.

A is the valve-body, having the inlet a and the outlet b' and the thoroughfare c, which is positively controlled by the main automatic valve-piece B.

O is the independent cl1eck-valve,a'hich independentlycontrolsthethoronghfare c. The main valve-piece is operated automatically. In the construction shown it is a thermostatic expanding piece; lout the invention may be employed with other formsofautomatic valvepieces/ The check-valve O is so arranged that the suctionor lower pressure on the outlet side of the valve will openitand the relief of the suction or the reversal of its direction will cause it to close. In the construction shown the check-valveconsists of a plate adapted to fit a seat about the thoroughfare and is carried loosely upon a pin or support D, with a springE between the support and plate acting against" the suction and tending to close the valve upon its seat. In the construction shown the check-valve is applied to a thermostatic valve device of the character shown in fLettersfPatent No. 642,533, January 30, 1900, in which the thoroughfare is formedin a seat-piece F and consists of transverse passage-ways f, meeting in a central opening g inthetop, with vertical passage-ways 0 extending through the piece, but not communicating with the passage-ways f and opening atthe top on a lower level than the central opening g. \Vhen the valve is open, the air and water of condensation pass through the passage-ways f g c, and when the valve-piece B is expanded by steam it closes the passage-way g and shuts the Valve. Such a valve device and its operation are fully described in the Patent No. 642,533and also in Letters Patent No. 600,653, March 15, 1898.

The check-valve Gis located under the base of the seat-piece F,over the passage-Ways c,

and is loosely supported'by a screw D, with the springE between the screw-head and the check-valve 0.

Normally the suction or lower pressure upon the outlet side of the valve will hold the check-valve 0 off of its seat and leave the thoroughfare c 0 open, to be controlled in the usual manner by the main valve-piece B. If, however, for any cause-for example, sudden or excessive condensation in a radiator or drying-cylinder connected withthe va1vea greater suction should be temporarily prod need on the inlet side ofthe valv'e than on the outlet-side, the check-valve C will instantly close upon the seat and prevent the water of Condensation, air, or vapor in the return being drawn back through the valve into the radiator or cylinder. The instant the abnormal condensation or partial vacuum on the inlet sideis reduced and normal conditions are restored the check will be automatically opened and the discharge of the air and waterpermitted. v

To keep the spring E free from oil and dirt, the lower edge of the check 0 may be provided with a flange on, having an'inclined inner edge, which will tend to direct such water as may collect upon the check-valve outward away from the screw D and spring E.

piece to control said thoroughfare, and an auxiliary check-valve also controlling said thoroughfare and arranged so as to be kept normally open by the suction or lower pressure in the outlet-of the valve-body.

In testimony of which invention I have hereunto set my hand.

JOHN ,A'. snRRn-Lt.

Witnesses:

JAMES R. SOHENCK, JAMES G. EADIE. 

